After the last frost date in your planting zone:
Plant Amaryllis bulbs in the spring.
Choose a partially shady place (4-6 hours) with morning sun and afternoon shade. Too much sunlight may burn the leaves, and too much shade will inhibit flowering.
Cultivate the native soil with organic matter like compost, bloom boosting fertilizer (0-10-10), and bone meal amendments.
Keep the top one-third of the bulb exposed above the soil's surface.
Space multiple bulbs 12-15 inches apart.
Keep the soil consistently moist but not soggy during the growing season.
Before planting Amaryllis during the holiday season of November and December, expose the bulbs to temperatures of 50°F-55°F for 8 to 10 weeks. If held over from the previous year and planted, they will need to go through a dormancy period. Keep the bulbs cool (or refrigerated separately from fruit or vegetables) and in a semi-dark location until mid-September. After dormancy, plant in moist, well-draining potting mix with half of the bulb exposed above the surface. Place in bright, indirect light in warmer temperatures of 70°F to 75°F. In six to twelve weeks, blooms will appear.